Combined compasses and-calipers



{l lo M deLy G. P. O0NANT.-

GOMBINED comrAssns AND UALIPERS. No. 288.163. PatentedjNov. 6, 1883;

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45 ficient to retain the parts in any desired po- GEORGE P. OONAN B OF GENEVA LAKE, WISCONSIN.

COMBINED coMPAssEs AND CALlPERS.

SPECIFICATION forming art of Letters Patent No. 288,163, dated November 6, 1883.

' Application filed April 12, use. (No model.)

To all whom it may concern:

Be it known that LGnonsn I. Cormnr, a citizen of the United States, residing at Geneva Lake, in the county of Walworth and State of Wisconsin, have invented certain new and useful Improvements in Combined Compasses and Calipers, of which the following is a specification, to wit:

My invention relates to combined compasses and calipers and it consists in certain peculiarities of construction and arrangement view with the adjusting device; Fig. 3, a dewhereby the points are always kept perpendicular to the work, substantially as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe its construction and operation, referring to the accompanying drawings, in which- Figure 1 is a side elevation; Fig. 2, a similar tail view of the same.

, A represents the main legs of the compasses, which are pivoted together at their upper ends, as usual, but are formed with short arms a a, extending in rear of this pivotal point and crossing each other, as represented. To the ends of these arms a a are pivoted two braces or trusses, B B, each of which is jointed, as seen at b, and pivoted at its lower end to the lower ends of the corresponding legs, A A, of the compasses. To the lower ends of the smaller joints of the trusses BB are rigidly secured short extensions B B, each of which is provided with removable points I), in place of which may be inserted pen and pencil or caliper-points for different uses. It will therefore be understood that when opened out to any position the truss or brace rods B B will be bent at their joint b, and the smaller. section always held in such aposition as to retain'the pen or pencil points in an upright or parallel position, which is a great advantage in all kinds of work.

In most cases the friction-j oints will be sufsition; but in order to provide for a firm adjustment and more positive action, I provide a clip or clevis, G, in which the ends of the 1 short arms a a are inclosed,-and the pivots a,

formed of sufficient length screw,

In Fig. 3 is shown a modification of this ad-.

justing device, inwhich the arms a a are each provided with a hinged toggle, c e, which are pivoted together at their upper ends, and the clip 0 is secured to their pivotal point, while the clip D is secured to that of the legs, as before described. This device is applicable for use as a compasses,inside or outside calipers, circle-pen,

or circlc-pencil by simply substituting differ-- ent points, as will be readily seen.

Having thus fully described my inveniion, what I claim as new, and desire to secure by Letters Patent, is-' '1. In a compasses, the combination, with the main legs having rearwardly and laterally extending arms, of two jointed arms or braces hinged to the arms and also to the lower ends of the legs, and the feet or points rigidly secured to the braces, and adapted to standparallel in whatever position the device may be set, substantially as and for the purpose set forth.

2. In a compasses, the main-legs, formed or provided withrearwardly and laterally extending arms, in combination with two clips, one of which acts upon the short arms and the other on'the legs, and an adjusting-screw swiveled in one clip and passing throughthe 2 I 28$,l63 I sions B, and pivoted or hinged to the arms a presence of two Witnesses. and legs A in combination with the clip 0' provided with slots 0, the sWiveled screw D: GEORGE (DONAL I arms a a, jointed braces 13 B, having exten- In testimony WhereofI affix my signaturein 5 and clip D, all constructed and arranged to "Witnesses: operate substantially as and for the purpose J. E. STEVENSON, set forth. FRANK J oHNsoN. 

